github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/sql/opt/idxconstraint/testdata/optional (about)

     1  index-constraints vars=(int, int) index=(@1)
     2  @1 > 2 AND @1 < 4 AND @2 = 2
     3  ----
     4  [/3 - /3]
     5  Remaining filter: @2 = 2
     6  
     7  index-constraints vars=(int, int) index=(@1)
     8  @1 > 2
     9  optional: @1 < 4 AND @2 = 2
    10  ----
    11  [/3 - /3]
    12  
    13  index-constraints vars=(int, int) index=(@1 desc, @2 desc)
    14  optional: @1 >= 2 AND @1 <= 4 AND @2 IN (1, 2, 3)
    15  ----
    16  [/4/3 - /2/1]